Terminal connection for electrical apparatus



L. W. DOWNES TERMINAL CONNECTION FOR ELECTRICAL APPARATUS March 9 1926.

Filed Feb. 14 1922 Inventor: Louis W. Downes, y MM .H is -f\t torney.

P......m...9,f1f926. M 1.516.102

UNITED STATES]: PATENT OFFICE.

f LOUIS W. DOWNES, OF PROVTDENGE, RHODE ISLAND, ASSIGNOR '10 GENERAL ELEC- TRIC COMPANY, ACOBPORATION OF NEW YORK.

' TERMINAL CONNECTION FOB ELECTRICAL APPARATUS.

Application filed. February 14, 1922. Serial No. 536,549.

To all it may concern: tion of brass pipe 8 to which the lead armor Be it known that I, LOUIS -W. DowNEs, of the conductor cable-may be Connected by I a" citizen of the United States, residing at: a wiped joint as indicated'at-Q in Fig. 1. Providence, in the county of Providence, The apparatus terminal is in the form of State of Rhode Island, have invented cera U-shaped copper rod or wire 10 extending tain new and. useful Improvements in Terfrom the binding postll outwardly through minal Connections for ElectricaliApparatus, the pipe union end 6 and provided at its 1 of which the following is a specification. outer end with a slip contact sleeve 12 adapt- The present invention relates to terminal ed to telescopicallyreceive a split plug ter- 19 connections for high potential electrical ap--' minal 13 secured to the end of the detach- 6 paratus whereby conductor wires or cables able conductor cable 14.

may be connected detachably thereto. In order to securely anchor the U-shaped Among the objects of my invention are the terminal rod 10 relatively to the casing and provisionof a terminal for electrical appaat the same time efl'ectually insulate it there ratus extending through the casing thereof from, I provide it with a shouldered enlarge- 7 and so anchored therein through insulation ment 15 by soldering or welding thereto a that nomechanica-l stresses imposed thereon wrapping of. wire at a point slightly above in use can be transmitted to the apparatus the threaded opening 5 in the casing, and ,within the casing; the provision of a thorthen tightly wrap about the rod 10 and its oughly efiicient' detachable connection for enlargement several thicknesses of fibrous 1* electrical apparatus which shall be compact insulating tape 16, such as oiled cambric. and capable of application without necessi- An insulating sleeve 17 is slipped over the j tating enlargement of the apparatus casing .contact sleeve 12 and over the wrapping of [over that employed with continuous cable; tape 16 to just beneath the enlargement 15.

25 leads; and the provision of a detachable eon- A second and shorter sleeve 18 of paper or $0 nection for electrical apparatus which shall the like is passed over sleeve 17 to firmly permanently maintain its insulative propersupport the latter within the bore of the ties irrespective of the various heat and end 6 of the pipe union. The inner wall moisture conditions to which it may be subof the nozzle-like projection 4 has a rela- 80,j t d tively rough surface, being of cast iron, and

I have found the invention to be especially this is first coated with shellac varnish and useful in connection-with the formof electhen a cement filling 20 of artificial rosin trical apparatus known as oil fuses in which or other substance capable of resisting a safety fuse link is immersed in a bath of weather and temperature efi'ects, is poured ;,oil contained in the casing,such asis shown in melted form through a hole 19 into the anddescribed in the patents to myself and pocket of the nozzle-shaped end, about the another No. 1,195,7 90, August 22, 1916, and enlarged portion of the taped terminal rod No. 1,248,090, November 2 1917. r 10, and the upper end of the sleeve 17 where I In the accompanying drawing, Fig. 1 upon solidifying it unites and seals the in- ,4 shows in outline elevation an oil fuse with sulating parts together and to the casing I my terminal connections applied thereto, and cover.

Fig. 2 is a vertical section on a larger scale In order to insulate the cable terminal of the terminal and adjacent portion of the plug 13 from the surrounding metal parts, apparatus casing. t a sleeve 21 of insulation is forced into the As shownin the drawing, the apparatus brass pipe 8 and extends freely through the casing comprises an oil receptacle part 1 'pipe union so that when the parts of the and aeover part 2 ofc-ast iron rigidly bolted union are coupled together, its upper end is together with an oil-tight joint 3 between disposed adjacent the lower end of the short them. The opposite ends of the cover part fiber-tube 18 and for about one-halt its I W- '2 are formed mto downwardly-directed nozlength telescopes with the fixed sleeve 17 and zlelike projections 4 having threaded openthereby providing ample creepage surface. 'ings 5. It is to be noted that the terminal connec- .Into each of the threaded openings 5 is tion and its insulation require no greater screwed one end 6 of a pipe union while the opening in the casing than in the case of a opposite end 7 thereof receives a -short seccontinuous conductor cable entering the egg ing as has been the prior practice. Also any stresses that may be imposed upon the slip contact sleeve 12, as in inserting and with drawing the plug contact 13, cannot disturb the position of the U-shaped copper rod 10.

VVhile I have shown and described the best embodiment of the invention known to me; I do not desire to be restrictedthereto.

tric conductor entending out of said casing and into said union and having at its outer end a SllP contact member,

fibrous insulation surrounding said-conductor, an insulating sleeve surrounding said slip contact member and a portion of the fibrous insulation of said conductor, and insulating cement surroundin embracing the fibrous insulation of said electric conductor and serving positively to anchor said conductor and the parts connected thereto'to said metallic casing.

8. The combination with a metallic casing having an opening therein, an electric conductor extending through said opening and provided with a shouldered enlargement inside said casing, fibrous insulation surrounding said conductor and its shoulderecl enlargement and artificial rosin poured in melted state into the space between said fibrous insulation and the inner surface ofsaid casing to anchor said conductor posi tively to said casing.

In witness whereof, I have hereunto set my hand this 7th day of February, 1922.

LOUIS W. DOWN ES.

the upper end of said sleeve and 

